Rolling-mill.



J. S. WORTH.

ROLLING MILL.

APPLICATION FILED AUG-21,1915.

1,206,636. Patenwd Nov. 28, 1916.

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J. S. WORTH.

ROLLING iVllLL.

APPLICATION man AUG-21, 1915.

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HOLUNG MILL.

APPLICATION HLED Auehzl, I915.

PatelitedNov. 2%, 19m

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ROLLING MILL.

I APPLICATION men AUG.2I, 1915. 1 ,%6-fi3@ Patented Nov. 28, 1916.

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05km? M 0002 UNITED STATES PATENT OFFICE.

JOHN S. WORTH, 0F CQATESVILLE, PENNSYLVANIA, ASSIGNOR T0 HIMSELF AND WILLIAM P. WORTH, OF COATESVILLE; PENNSYLVANIA.

ROLLING-MILL.

Specification of Letters Patent.

Application filed August 21, 1915. Serial No. 46,661.

To all whom it may concern:

Be it known that I, JOHN S. WORTH, a citizen of the United States, and a resident of Coatesville, in the county of Chester, State of Pefiksylvania, have invented certain Improvements in Rolling-Mills, of which the following is a specification.

One object of'my invention is to construct a rolling mill which will roll extremely wide plates, and also roll them extremely thin in proportion to the width.

A further object of the invention is to construct the rolling mill so that the working rolls, or those in contact with the plates or sheets may be made with diameters small in proportion to their lengths, and at the same time be properly supported so as not to deflect or break; as a small roll reduces the plate faster than a large one, is less liable to break from contact with hot metal, and is cheaper to rene Another object is to provide a means of increasing the length of the roll journals subjected to the pressure of reducing the without increasing the distance bethe centers of the housings, or journal nd a still further object of the invention is to provide means whereby any or all of the working rolls can be driven by friction,-and be free from torsional strain.

These objects I attain in the following manner, reference being had to the accompanying drawings, in which:

Figure 1 is a front elevation of my improved rolling mill; Fig. 2 is an end view; Fig. 3 is a sectional view on the line a-a, Fig. 1; Fig. 4 is a view in which the working rolls are driven directly; Fig. 5 is an enlarged sectional view on the line 5.-5, Fig. 3; and Fig. 6 is a side view of'a portion of the mill illustrating the means for driving the intermediate roll.

My invention may be termed a 5-h1gn rolling mill, as it consists of five rolls, the lower working roll 1, the upper Working roll 2, the intermediate roll 3, the lower supporting roll 1, and the upper supporting roll 5. These rolls are mounted in the ordinary plates tween supports.

' boxes adapted to the housings 6, which may be of any suitable type suflicient to support the roll structure. The plate is rolled similarly to the 3-high roll, first between the lower working roll 1 and the intermediate roll 3 and returned between the upper working roll 2 and the intermediate roll 3, the latter being raised and lowered alternately, whlle the upper working roll is lowered a little at each pass of the plate by the housing screws 18, to give the proper reduction; the rolls 4 and 5 being in contact at all times with their respective working rolls so as to support them throughout their length in order to make aplate, or bloom, of an even thickness throughout.

At one side of the rolling mill structure is the driving gear structure, consisting, in the present instance, of housings 7 and gears 8, 9 and 10. 8 is the driving gear connected to the shaft 11 of the engine, and 9 and 10 are the gears which are connected to the rollsof the mill. In the present instance, the gear 9 is connected through a shaft 12 with the lower supporting roll 4 and the gear 10 is connected by a shaft 13 with the upper supporting roll 5. The shafts are connected by universal joints at each end to the driving and driven elements in the ordinary manner. In this instance, the supporting rolls are driven and the working rolls are driven by friction through the supporting rolls.

It will be noticed upon referring to Figs. 1 and 5, that the working face of each supporting roll is less in length than the faces of the working rolls and that the housings and main boxes are increased in width, as at 14, to form bearings of greater width for the supporting rolls. This is accomplished without decreasing the width between the housings at the working rolls. The present rolls are designed to roll plates over thirteen feet wide, and the space between thehousing centers must be minimized in order to give the required strength. By roviding each working roll with a supporting roll, I find that I can make both the working rolls and the supporting rolls considerably less in diameter than would be required for a single working roll of the same length. Such a roll would have a much greater weight than either the working roll or the supporting roll, and would be expensive if not impossible to obtain.

The working rolls and the supporting rolls need not necessarily be of the same diameter, but in some cases, and especially in reducing a plate of considerable width to a light gage, the Worln'ng rolls would preferably be of small diameter so as to reduce the plate easily and quickly while the supporting rolls porting rolls and 3 is an intermediate roll.

The intermediate gear 8, of the train of gears 9, 8' and 10, is connected to the intermediate roll 3" by a shaft 19. In the present instance, the gear 9 is connected to the supporting roll 4" by the shaft 12" and the gear 10 is connected to the up r supporting roll 5 by the shaft 13". he pinions in this case should be of practically the same proportionate diameters as the directly driven rolls in order to obtain the same surface speed for all of the rolls.

The intermediate roll 3 is raised and lowered in the ordinary manner. by the vertical structures 15, which are connected to the trunnions of the rolls and to any suitable shifting mechanism, such as that having hydraulic or air cylinders' In the present instance, 16, 16 are the piston rods of a hydraulic cylinder and the vertical structures are connected to cross heads carried by these rods. 17, 17 are the piston rods of the hydraulic cylinders, which are connected to the upper workin roll so that it can be manipulated.

ile I prefer to drive the supporting rolls, as indicated in Fig. 1*, directly from the driving mechanism and to drive the working rolls by frictional contact with the supporting rolls, the working rolls may be driven directly and the supporting rolls driven by frictional contact with them, as in Fig. 4, in which 1 and 2" are the working rolls and 3 is the intermediate roll, and 4' and 5 are the supporting rolls, and the shafts 12 and 13 connect the driving gears directly with the trumiions of the working rolls 1' and 2' respectively.

Thus it will be seen that I am enabled to make a rolling mill which will accurately roll plates of great width or of thin gage, without increasin the diameter of the rolls. This is accomplished by the use of supporting rolls which take the strain of the rolling action and neither the supporting rolls nor the working rolls are of excessive diameter.

I claim:

1. The combination in a rolling mill, of housings; two working rolls; supporting rolls, one supportin roll mounted above the upper wor ing roll and the other below the upper working roll, said supporting rolls being less in length than the working rolls and having trunnions; bearings for the trunnions of the supportin rolls; said bearings being of a greater wi th than the housings and taking the thrust of the working rolls.

'2. The combination in a rolling mill, of housings; two working rolls; a'supporting roll back of one of said working rolls, said supporting roll being less in length than the working roll against which it rests, said supporting roll having trunnions; bearings for the trunnions ofsaid supporting "roll, said bearings being of a greater width than the housings and taking the thrust of the work'- ing rolls.

3. The combination in a rolling mill, of housings; two working rolls and an intermediate roll; a su porting roll mounted below the lower wor ing roll and a su porting roll mounted above the upper working roll; means for directly driving the two supporting rolls; and means for driving the intermediate roll.

JOHN S. WORTH. 

